Well, he has scored over 10 goals at Bayern exactly 0 teams in his career as a forward. He has played 30 matches for Bayern exactly 0 times in the past 4 years. He would clearly like to leave.
If only there were another, similarly-positioned player in the same league we could use as a barometer. Oh wait! There's that other lad who's younger, has scored twice as many goals, been available more often and is, conincidentally, also likely to leave. His price tag? Right around 100m.
It would be like going to a car dealership with 30k to buy a BMW, and the Kia guy across the road offering up their sedan for just 29k. I mean, listen they're both cars but yeah.
(proud kia owner over here, nothing against them)